If the problem isn t with the breaker box examine the unit s wiring for loose connections.
Gas wall heater thermostat not working.
Make sure they are not blocked by tugs drapes or furniture.
Reset the breaker or replace the blown fuse if necessary.
2 remove the thermostat s cover.
If your heater s not working at all check for a tripped breaker or blown fuse.
If your heater isn t working but you can see a steady blue pilot flame the thermostat may not be signaling the heater to come on.
Each time the heater works for a week or three.
Choose the red and white wires if you are having problems with.
The gas wall heater will not turn on.
With most types you just pull it straight out but check your manufacturer s.
If it does not turn the furnace and air conditioner power back off again at the breaker panel.
Not enough heat.
The reason that i think it is the thermastat is because i take it off and touch the wires together and each time the heater comes on.
That said if there is a physical click in the thermostat sounds like it is functioning at least mechanically.
Registers closed or blocked.
On the furnace side it could be a bad main gas valve solenoid which would still allow the pilot light to function but not enable the main valve.
I changed the thermastat and the heater worked for a week or two.
Thermostat set too low.
I woke up this am to no heat and no pilot got pilot lit before work but when i got h read more.
I have changed the thermastat 3 times.
My gas wall heater vented will not heat the pilot has stayed lit for the past few hours but burner won t go on.
Clean or replace filter.
Thermostat does not control temperature 1 turn the power off to the heating system.
Make sure gas valve to furnace is fully open.
That could be because the temperature around the thermostat.
The pilot lite is lit.
Make sure all registers are open.
3 use a soft brush or vacuum with a brush attachment to gently and carefully remove dust and dirt.